Home / 149,105.70-205,747.16-100,812.69

Finding the Fourth Proportional to 149,105.70, 205,747.16 and 100,812.69

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Solution

The fourth proportional to 149,105.70, 205,747.16 and 100,812.69 is: 139,108.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,105.70 : 205,747.16 = 100,812.69 : x
  2. Step 2: Convert to fraction form
    149,105.70/205,747.16 = 100,812.69/x
  3. Step 3: Cross multiply
    149,105.70x = 205,747.16 × 100,812.69
  4. Step 4: Simplify right side
    149,105.70x = 20,741,924,155.40
  5. Step 5: Solve for x
    x = 20,741,924,155.40/149,105.70
  6. Step 6: Final answer
    x = 139,108.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.